Results 11 to 20 of about 4,495 (247)

Rolling Bearings Fault Diagnosis Based on Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise, Nonlinear Entropy, and Ensemble SVM

open access: yesApplied Sciences, 2020
Rolling bearings are fundamental elements that play a crucial role in the functioning of rotating machines; thus, fault diagnosis of rolling bearings is of great significance to reduce catastrophic failures and heavy economic loss. However, the vibration
Rui Li   +4 more
doaj   +1 more source

Vibration diagnostics of bearing assemblies of paper machines

open access: yesТехнічна інженерія, 2023
The reliability and performance of technological equipment largely depends on timely and reliable diagnostics of less durable assembly units, which include rolling bearings.
Ya.A. , V.V., I.P. , O.M.
doaj   +1 more source

Fatigue Life Analysis of Rolling Bearings Based on Quasistatic Modeling

open access: yesShock and Vibration, 2015
Rolling bearings are widely used in aeroengine, machine tool spindles, locomotive wheelset, and so forth. Rolling bearings are usually the weakest components that influence the remaining life of the whole machine. In this paper, a fatigue life prediction
Wei Guo   +3 more
doaj   +1 more source

Investigation of the influence of the degree of contact of rolling surfaces on contact stresses in ball radial bearings

open access: yesRUDN Journal of Engineering Research, 2022
The study is devoted to the determination of the coefficients of the degree of contact of rolling surfaces, considering the tolerance field of rolling bodies, as well as the influence of the coefficients of the degree of contact on the maximum contact ...
Yuriy V. Belousov   +2 more
doaj   +1 more source

Creep Phenomenon in Thrust Washers of Needle Roller Bearings

open access: yesTribology Online
In radial rolling bearings, a phenomenon called creep occurs in the outer ring (the stationary/fixed raceway) when the bearing is subjected to excessive load.
Hiromichi Takemura   +2 more
doaj   +1 more source

Experimental Assessment of Influence of the Ball Bearing Raceway Curvature Ratio on the Level of Vibration

open access: yesCommunications, 2020
Raceway curvature ratio is a very important parameter, because its values influence the performance characteristics of rolling-element bearings, their durability and the level of generated vibrations.
Pawel Zmarzly
doaj   +1 more source

Chaotic prediction of vibration performance degradation trend of rolling element bearing based on Weibull distribution

open access: yesScience Progress, 2020
Rolling element bearings are used in all rotating machinery, and the degradation performance of rolling element bearings directly affects the performance of the machine.
Li Cheng, Xintao Xia, Liang Ye
doaj   +1 more source

Rolling Bearing Fault Diagnosis Based on Multiscale Permutation Entropy and SOA-SVM

open access: yesMachines, 2022
The service conditions of underground coal mine equipment are poor, and it is difficult to accurately extract the fault characteristics of rolling bearings.
Xi Zhang   +4 more
doaj   +1 more source

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

open access: yesFEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke   +4 more
wiley   +1 more source

Memory and Resting‐State Connectivity in Acute Transient Global Amnesia: A Case–Control fMRI Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Transient global amnesia (TGA) is a striking model of isolated amnesia. While hippocampal lesions are well described, the network‐level mechanisms and the precise neuropsychological profile remain debated. Our objective was thus to characterize functional and neuropsychological correlates of acute TGA and their ...
Elias El Otmani   +10 more
wiley   +1 more source

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